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    • 5. 发明授权
    • Retard roller and sheet feeder
    • 减速辊和送纸器
    • US06634637B2
    • 2003-10-21
    • US09977259
    • 2001-10-16
    • Yuma YoshidaYoshihiro WagoYasuhiro IwamotoHideki Sendo
    • Yuma YoshidaYoshihiro WagoYasuhiro IwamotoHideki Sendo
    • B65H352
    • B65H3/5215B65H27/00B65H2401/10B65H2404/1115B65H2404/1312
    • A retard roller of non-ground surface type which is virtually free from adhesion of paper dust thereby to have an excellent friction coefficient sustain ability, and which is free from creaky noises at a relatively low sheet feeding speed; a retard roller of non-ground surface type having little variation in outer diameter; and a sheet feeder employing such a retard roller. The retard roller comprises a roller body and a shaft extending axially therethrough, the roller body having a textured roller surface comprising a multiplicity of island portions (10) and a sea portion (11) recessed from the island portions, the island portions and the sea portion each having a multiplicity of fine projections (12). The ratio S1/S2 of the total area S1 of the island portions to the area S2 of the sea portion preferably is 0.25 to 0.55. The fine projections preferably each have a height of 3 to 25 &mgr;m.
    • 一种非地面型延迟辊,其基本上没有纸粉附着,因此具有优异的摩擦系数维持能力,并且在相对低的进纸速度下没有吱吱作响的噪音; 非地面型延迟辊外径差异小; 以及采用这种延迟辊的片材进给器。 延迟辊包括辊主体和轴向延伸穿过其中的轴,该辊主体具有纹理化的辊表面,该纹理辊表面包括多个岛部分(10)和从岛部分凹陷的海洋部分(11),岛部分和海 每个具有多个精细突起(12)的部分。 岛部的总面积S1与海部的面积S2的比S1 / S2优选为0.25〜0.55。 优选的是,每个凸起的高度优选为3〜25μm的高度。